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303.5 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

The Cat® 303.5 CR Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

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    Benefits

    4 Industry First Features

    Cat Exclusives in a Mini Excavator

    Up to 5% Lower Total Ownership Costs

    with more common parts, lower repair costs and tilt up cab

    Up to 10% More Performance

    with programmable operator settings and faster cyle times

    Learn more about the 303.5 CR Mini Hydraulic Excavator

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    • Blade
      Height
      13.8 in
      Width
      70.1 in
    • Certification - Cab and Canopy
      Roll Over Protective Structure (ROPS)
      ISO 12117-2:2008
      Tip Over Protective Structure (TOPS)
      ISO 12117:1997
      Top Guard
      ISO 10262:1998 (Level I)
    • Dimensions (Approximate) - Long Stick
      Tail Swing with Extra Counterweight
      39.6 in
    • Dimensions (Approximate) - Standard Stick
      Tail Swing with Extra Counterweight
      39.6 in
    • Dimensions - Long Stick
      Boom Height - Shipping Position
      68.9 in
      Boom In Reach
      73.2 in
      Boom Swing - Left
      640 mm
      Boom Swing - Right
      34.3 °
      Dig Depth
      122.4 in
      Ground Clearance
      12.2 in
      Maximum Blade Depth
      21.1 in
      Maximum Blade Height
      15.2 in
      Maximum Dig Height
      197.6 in
      Maximum Dump Clearance
      141.7 in
      Maximum Reach
      216.9 in
      Maximum Reach - Ground Level
      211.8 in
      Note
      *Overall Shipping Length depends on blade position during shipment.
      O/A Shipping Height
      97.6 in
      O/A Track Width
      70.1 in
      O/A Undercarriage Length
      87.4 in
      Overall Shipping Length*
      190.9 in
      Stick Length
      61.4 in
      Swing Bearing - Height
      22.2 in
      Tail Swing with Counterweight
      37.8 in
      Tail Swing without Counterweight
      35 in
      Track Belt/Shoe Width
      11.8 in
      Vertical Wall
      94.1 in
    • Dimensions - Standard Stick
      Boom Height - Shipping Position
      59.8 in
      Boom In Reach
      69.3 in
      Boom Swing - Left
      25.2 °
      Boom Swing - Right
      34.3 °
      Dig Depth
      110.6 in
      Ground Clearance
      12.2 in
      Maximum Blade Depth
      21.1 in
      Maximum Blade Height
      15.2 in
      Maximum Dig Height
      193.7 in
      Maximum Dump Clearance
      137.4 in
      Maximum Reach
      207.5 in
      Maximum Reach - Ground Level
      202 in
      Note
      *Overall Shipping Length depends on blade position during shipment.
      O/A Shipping Height
      97.6 in
      O/A Undercarriage Length
      87.4 in
      Overall Shipping Length*
      189 in
      Stick Length
      49.6 in
      Swing Bearing - Height
      22.2 in
      Tail Swing with Counterweight
      37.8 in
      Tail Swing with Extra Counterweight
      39.6 in
      Tail Swing without Counterweight
      35 in
      Track Belt/Shoe Width
      11.8 in
      Vertical Wall
      88.6 in
    • Engine
      Bore
      3.3 in
      Displacement
      104 in³
      Emissions
      Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
      Engine Model
      C1.7
      Gross Power - 2,400 rpm - SAE J1995
      24.7 hp
      Net Power
      23.6 hp
      Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
      23.6 hp
      Note
      Net power is tested per ISO 9249 and 80/1269/EEC.
      Note (2)
      Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load.
      Stroke
      3.9 in
    • Hydraulic System
      Auxiliary Circuit - Primary - Flow
      18 gal/min
      Auxiliary Circuit - Primary - Pressure
      3553 psi
      Auxiliary Circuit - Secondary - Flow
      7 gal/min
      Auxiliary Circuit - Secondary - Pressure
      3553 psi
      Digging Force - Bucket
      7419 lbf
      Digging Force - Stick - Long
      3799 lbf
      Digging Force - Stick - Standard
      4249 lbf
      Note
      *Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
      Operating Pressure - Equipment
      3553 psi
      Operating Pressure - Swing
      2625 psi
      Operating Pressure - Travel
      3553 psi
      Pump Flow at 2,400 rpm
      26 gal/min
      Type
      Load Sensing Hydraulics with Variable Displacement Piston Pump
    • Service Refill Capacities
      Cooling System
      1.8 gal (US)
      Engine Oil
      1.6 gal (US)
      Fuel Tank
      11.9 gal (US)
      Hydraulic System
      11.9 gal (US)
      Hydraulic Tank
      5.3 gal (US)
    • Sound
      Average Exterior Sound Pressure (ISO 6395:2008)
      94 dB(A)
      Note
      European Union Directive ‚ "2000/14/EC"
      Operator Sound Pressure (ISO 6396:2008)
      78 dB(A)
    • Sustainability
      Recyclability
      95%
    • Swing System
      Boom Swing - Left
      75 °
      Boom Swing - Right
      50 °
      Machine Swing Speed
      9 r/min
    • Travel System
      Gradeability - Maximum
      30 degrees
      Ground Pressure - Maximum Weight
      5.2 psi
      Ground Pressure - Minimum Weight
      4.3 psi
      Maximum Traction Force - High Speed
      3799 lbf
      Maximum Traction Force - Low Speed
      6969 lbf
      Travel Speed - High
      2.8 mile/h
      Travel Speed - Low
      1.6 mile/h
    • Weight Increase from Minimum Configuration
      Angle Blade
      353 lb
      Cab
      309 lb
      Counterweight
      221 lb
      Extra Counterweight
      551 lb
      Long Stick
      44 lb
      Steel Tracks
      287 lb
    • Weights
      EU: CE Plate Weight with Cab***
      8004 lb
      EU: CE Plate Weight with Canopy***
      7784 lb
      Maximum Operating Weight with Cab**
      9239 lb
      Maximum Operating Weight with Canopy**
      8930 lb
      Minimum Operating Weight with Cab*
      7982 lb
      Minimum Operating Weight with Canopy*
      7673 lb
      Note (1)
      * Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight.
      Note (2)
      **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, bucket and extra counterweight.
      Note (3)
      ***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
      Operating Weight
      9239 lb
    ENGINE
    • Cat C1.7 NA Engine (U.S. EPA Tier 4 Final/EU Stage V)
    • Automatic Engine Idle
    • Automatic Engine Shutdown
    • Automatic Two Speed Travel
    • Fuel Water Separator
    • Power on Demand (not available in all regions)
    • Variable Displacement Piston Pump
    • Load Sensing/Flow Sharing Hydraulics
    HYDRAULICS
    • Smart Tech Electronic Pump
    • Accumulator
    • Automatic Swing Brake
    • Auxiliary Hydraulic Lines
    • One and Two Way Auxiliary Flow
    • Continuous Auxiliary Flow
    • Auxiliary Line Quick Disconnects
    OPERATOR ENVIRONMENT
    • Tilt-up Canopy or Tilt-Up Cab
    • Top Guard ISO 10262:1998 Level I
    • ROPS – ISO 12117-2:2008
    • TOPS – ISO 12117:1997
    • Stick Steer Mode
    • Travel Cruise Control
    • Control Pattern Changer (optional in some regions)
    • Adjustable Wrist Rests
    • Washable Floor Mat
    • Travel Pedals and Hand Levers
    • Machine Security
    • Machine Security – Standard Key with Pass Code
    • Fabric Suspension Seat (Cab only)
    • Vinyl Suspension Seat (Canopy only)
    • Hydraulic Lockout – All Controls
    • Retractable High Visibility Seat Belt (75 mm/3 in)
    • Coat Hook
    • Cup Holder
    • Storage Pocket
    • Skylight
    • Mounting Bosses for Front
    • Signaling/Warning Horn
    • Interior Light (Cab only)
    • Boom Light, Halogen
    • Utility Space for Mobile Phone
    • Next Generation Color LCD Monitor (IP66)
      – Fuel Level and Coolant Temperature Gauges
      – Maintenance and Machine Monitoring
      – Performance and Machine Adjustments
      – Numeric Security Code
      – Multiple Languages
      – Hour Meter with Wake Up Switch
      – Jog Dial (cab only)

      Next Generation Advanced Monitor (Optional)
      – Fuel Level and Coolant Temperature Gauges
      – Maintenance and Machine Monitoring
      – Performance and Machine Adjustments
      – Numeric Security Code
      – Multiple Languages
      – Hour Meter with Wake Up Switch
    UNDERCARRIAGE
    • Rubber Belt (300 mm/11.8 in wide)
    • Dozer Blade
    • Dozer Blade Float
    • Angle Blade
    • Tie Downs on Track Frame
    BOOM, STICK AND LINKAGES
    • One Piece Boom (2400 mm/94.5 in)
    • Standard Stick (1260 mm/49.6 in)
    • Front Shovel Capable – Pin-On
    • Thumb Ready (not available in all regions)
    • Certified Lifting Eye (optional in some regions)
    ELECTRICAL
    • 12 Volt Battery
    • Software (machine and monitor)
    • Maintenance Free Battery
    • Signaling/Warning Horn
    • 12 Volt Power Socket
    OPERATOR ENVIRONMENT
    • Cab with Air Conditioning
    • Cab with Heater
    • Control Pattern Changer (optional in some regions)
    • No Travel Pedals and Hand Levers
    • Machine Security – Push to Start with Key Fob/Pass Code
    • Vinyl Non-Suspension Seat (Canopy only)
    • LED Front Lights
    • LED Front and Rear Lights
    • LED Boom Light
    • Mirrors Left and Right
    • Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only)
    UNDERCARRIAGE
    • Steel Track (300 mm/11.8 in wide)
    BOOM, STICK AND LINKAGES
    • Long Stick (1560 mm/61.4 in)
    • Front Shovel Capable – Dual Lock Manual Coupler
    • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
    • 2nd Auxiliary Hydraulic Lines
    • Boom Lowering Check Valve
    • Stick Lowering Check Valve
    • Hydraulic Quick Coupler Lines (not available in all regions)
    • Front Shovel Capable – Hydraulic Coupler
    ELECTRICAL
    • Battery Disconnect
    • Product Link PL243 (regulations apply)
    • Product Link PLE643 (regulations apply)
    • Travel Alarm (standard in some regions)
    GUARDING
    • Guard, Canopy
    • Guard, Mesh
    OTHER
    • Bio Oil Capable
    • Eco Drain
    • Water Jacket Heater

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